diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
--- a/sys/kern/kern_jail.c
+++ b/sys/kern/kern_jail.c
@@ -223,6 +223,7 @@
 	{"allow.nfsd", "allow.nonfsd", PR_ALLOW_NFSD},
 #endif
 	{"allow.extattr", "allow.noextattr", PR_ALLOW_EXTATTR},
+	{"allow.adjtime", "allow.noadjtime", PR_ALLOW_ADJTIME},
 };
 static unsigned pr_allow_all = PR_ALLOW_ALL_STATIC;
 const size_t pr_flag_allow_size = sizeof(pr_flag_allow);
@@ -4167,6 +4168,17 @@
 			return (0);
 		return (EPERM);
 
+	/*
+	 * Conditionally allow privileged process in the jail adjust
+	 * machine time.
+	 */
+	case PRIV_ADJTIME:
+	case PRIV_NTP_ADJTIME:
+		if (cred->cr_prison->pr_allow & PR_ALLOW_ADJTIME)
+			return (0);
+		else
+			return (EPERM);
+
 	default:
 		/*
 		 * In all remaining cases, deny the privilege request.  This
@@ -4631,6 +4643,8 @@
 #endif
 SYSCTL_JAIL_PARAM(_allow, extattr, CTLTYPE_INT | CTLFLAG_RW,
     "B", "Jail may set system-level filesystem extended attributes");
+SYSCTL_JAIL_PARAM(_allow, adjtime, CTLTYPE_INT | CTLFLAG_RW,
+    "B", "Jail may adjust system time");
 
 SYSCTL_JAIL_PARAM_SUBNODE(allow, mount, "Jail mount/unmount permission flags");
 SYSCTL_JAIL_PARAM(_allow_mount, , CTLTYPE_INT | CTLFLAG_RW,
diff --git a/sys/sys/jail.h b/sys/sys/jail.h
--- a/sys/sys/jail.h
+++ b/sys/sys/jail.h
@@ -254,7 +254,8 @@
 #define	PR_ALLOW_KMEM_ACCESS		0x00010000	/* reserved, not used yet */
 #define	PR_ALLOW_NFSD			0x00020000
 #define	PR_ALLOW_EXTATTR		0x00040000
-#define	PR_ALLOW_ALL_STATIC		0x000787ff
+#define	PR_ALLOW_ADJTIME		0x00080000
+#define	PR_ALLOW_ALL_STATIC		0x000f87ff
 
 /*
  * PR_ALLOW_DIFFERENCES determines which flags are able to be
diff --git a/usr.sbin/jail/jail.8 b/usr.sbin/jail/jail.8
--- a/usr.sbin/jail/jail.8
+++ b/usr.sbin/jail/jail.8
@@ -23,7 +23,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd March 16, 2024
+.Dd June 10, 2024
 .Dt JAIL 8
 .Os
 .Sh NAME
@@ -656,6 +656,8 @@
 .It Va allow.extattr
 Allow privileged process in the jail to manipulate filesystem extended
 attributes in the system namespace.
+.It Va allow.adjtime
+Allow privileged process in the jail to manipulate time of operating system.
 .El
 .El
 .Pp
@@ -1415,6 +1417,8 @@
 .Xr pkill 1 ,
 .Xr ps 1 ,
 .Xr quota 1 ,
+.Xr adjtime 2 ,
+.Xr ntp_adjtime 2 ,
 .Xr jail_set 2 ,
 .Xr devfs 4 ,
 .Xr fdescfs 4 ,
@@ -1436,6 +1440,7 @@
 .Xr mount 8 ,
 .Xr mountd 8 ,
 .Xr nfsd 8 ,
+.Xr ntpd 8 ,
 .Xr reboot 8 ,
 .Xr rpcbind 8 ,
 .Xr sendmail 8 ,